finally it works but I have another problem because I need to decode this also in widgets that I use like
'zii.widgets.CDetailView' or 'zii.widgets.grid.CGridView' I use these in the detailview and gridview but there I don't have any similar to :

echo CHtml::

I was looking for any clues and I found that there is an option like "type"=>"html", y tried it in the field that I want to render properly html code but it didn't work: